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A bell ringer decides to use a bowling ball to ring the bell. he hangs the 7.3kg ball from the end of a 2m long rope. He attaches another rope to the ball to pull the ball back and pulls it horizontally until the ball has moved 0.6m away from the vertical. How much force must he apply?
a 500 g mass hangs at the end of a 40 cm long string. it is struck by a 250 g mass moving at 0.5 ms to the right.
In a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, What should be the radius of curvature of the cornea
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge takes 40.0s to speed up
A nuclear power plant has a maximum steam temperature () of 280degrees C. It produces 790MW of electric power in the winter, when its is effectively -7 degrees C . If its summertime is 40 degrees C, what's its summertime electric power output, assumi..
When n moles of an ideal gas is allowed to expand from an initial volume of 10 m3 at a constant temperature T the work done is equal to : - nRT ln 4, What was the final volume of the gas
a charge q is uniformly distributed throughout a nonconducting sphere of radius r.a what is the magnitude of the
A small plastic bead has been charged to -15nC, What is the magnitude of the acceleration of a proton that is 0.90cm from the center of the bead
Two parallel wires are separated by a distance of 5.00 cm. Each wire carries a current of 2.69 A in the same direction, Is the force attractive or repulsive
A 0.495-kg mass is attached to a horizontal spring with k = 105 N/m. The mass slides across a frictionless surface. Find the mechanical energy of the system
Hydraulic engineers often use, as a unit of volume of water, the "acre-foot", What volume of water, in acre-feet, fell on the town
at a certain location the earths magnetic field has a magnitude of 6.7times10-5 t and points in a direction that is 69
A 80-g ball collides elastically with a 320-g ball that is at rest. If the 80-g ball was traveling in the positive x-direction at 5.75 m/s before the collision
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